[all-commits] [llvm/llvm-project] 89adc2: [HEXAGON] Fix corner cases for hwloops pass (#135439)

[aankit-ca via All-commits]

  Branch: refs/heads/release/20.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 89adc2d4f93b0f9dea251286bbb6561c7d7e7b0b
      https://github.com/llvm/llvm-project/commit/89adc2d4f93b0f9dea251286bbb6561c7d7e7b0b
  Author: aankit-ca <quic_aankit at quicinc.com>
  Date:   2025-04-25 (Fri, 25 Apr 2025)

  Changed paths:
    M llvm/lib/Target/Hexagon/HexagonHardwareLoops.cpp
    A llvm/test/CodeGen/Hexagon/hwloop-dist-check.mir
    M llvm/test/CodeGen/Hexagon/swp-phi-start.ll

  Log Message:
  -----------
  [HEXAGON] Fix corner cases for hwloops pass (#135439)

Add check to make sure Dist > 0 or Dist < 0 for appropriate cmp cases to
hexagon hardware loops pass. The change modifies the
HexagonHardwareLoops pass to add runtime checks to make sure that
end_value > initial_value for less than comparisons and end_value <
initial_value for greater than comparisons.

Fix for https://github.com/llvm/llvm-project/issues/133241

@androm3da @iajbar PTAL

---------

Co-authored-by: aankit-quic <aankit at quicinc.com>
(cherry picked from commit da8ce56c53fe6e34809ba0b310fa90257e230a89)



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